docs: def get_content_slug_by_slug(self, slug):
          """Returns the latest :class:`Content <pages.models.Content>`
          slug object that match the given slug for the current site domain.
  
          :param slug: the wanted slug.
          """
          content = self.filter(type='slug', body=slug)
          if settings.PAGE_USE_SITE_ID:
              content = content.filter(page__sites__id=global_settings.SITE_ID)
          try:
              content = content.latest('creation_date')
          except self.model.DoesNotExist:
              return None
          else:
              return content